Christopher Miller served as United States Acting Secretary of Defense from November 9, 2020, to January 20, 2021, under President Trump. Before this role, he held positions including Assistant Sec. of Defense for Special Operations/Low Intensity Conflict and Deputy Assistant Sec. of Defense for Special Operations and Combating Terrorism. His responsibilities included overseeing special operations forces in counterterrorism and strategic policymaking at the National Security Council from March 2018 to December 2019. Miller is widely touted as a frontrunner for Secretary of Defence should President Trump be re-elected.